Can someone convert these equations into y=mx+b form so they’re easier to graph? thanks

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

Im literally having a mental breakdown

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me